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Summary of AOCI exclusive of reclassification (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | $ (9,426) | $ 1,717 | $ (6,732)
Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments before tax | (9,734) | 9,316 | (6,821)
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments tax benefit | 2,945 | (3,586) | 2,626
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax | (6,789) | 5,730 | (4,195)
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | (6,789) | 5,730 |
Current Year Actuarial Loss |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax | (4,307) | (6,525) | 2,075
Current Year Prior Service Cost |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax |  |  | (6,199)
Accumulated Defined Benefit Plans Adjustment |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax | (4,307) | (6,525) | (4,124)
Amount of Gain (Loss) Recognized in AOCI, Current year, tax benefit | 1,670 | 2,512 | 1,587
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | (2,637) | (4,013) | (2,537)
Interest Rate Contracts | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments before tax |  | 1,083 |
Commodity Contract | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments before tax | $ (9,734) | $ 8,233 | $ (6,821)

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